Not sure why Jersey would give a warning, maybe just to make sure that's what you really want. The reason is that a resource method with @Path("/") is redundant, as it's already implied if you were just to do

@Path("test")
public class Test {
@GET
public String test(){}
}

without the @Path("/"). It works the same. So if you have these, remove them, and it should take away the warnings.